Cement material.



. COMPOSITIONS,

COATING OR PLASTIC.

tx'dmmsz UNITED STATES PATENT OFFICE.

PHILIP F. .AJPFEL AND NEELIE 1B. AIPFEL, F SEATTLE, WASHINGTON.

CEMENT MATERIAL.

No Ifrawing.

Specification of Letters Patent.

Patented Jan. 16, 1912.

To all whom it may concern:

Be it known that we, PHILIP F. APFEL and NEELIE B. APFEL, citizens of the United States, residing at Seattle, in the county of 5 King and State of Washington, have invented a new and useful Cement Material, of which the following is a specification.

The object of our invention is to provide an improved cement material which shall be comparatively inexpensive to manufacture and exceptionally durable in possessing the quality of resisting contraction and expansion under change of temperature and with a e.

The essential ingredients for the compound forming our new cement-material are magnesium oxid and sodium bicarbonate; and the material may be produced as follows: By intimately mixing 1 part of ma nesium oxid with an equal part of bicar onate of soda either in water or in the form of ry pow ers, subsequently mixed with water; suificient water being used to dissolve the sodium bicarbonate and unite it with the magnesium oxid, forming an insoluble cement, to which may be added, either before or after adding the water, suitable filler-material, such as sand, dust or any or a of these, t Fa mine and wearing quality and eliminate tendency to expansion and contraction with age and variations in temperature, and also suitable coloring material.

A somewhat modified procedure consists in mixing magnesium oxid with a saturated solution of sodium bicarbonate in water to the consistency of a thick paste, and adding any or all of the above-named fillers, if required, to obtain the desired coefiicient of expansion in the finished material. The resultant paste is adapted to be molded into sawdust and marble- 0 increase its plates or tiles, which may be given any desired color by mixing with the paste suitable coloring matter or blended colors, as for producin the articles in imitation of marble, scagllola, onyx, or other natural or artificial stones; or the paste may be laid on wood, stone, cement or other floor or wall foundation and troweled, like ordinary cement, until it becomes hard and smooth, or it may be molded on glass or other polished surfaces to cause it to receive therefrom, 1

when hard, a polished surface.

What we claim as new and desire to sesodium bicarbonate.

and a saturated solution of sodium bicarbonate, with filler and coloring materials. PHILIP F. APFEL. NEELIE B. APF EL. In presence of- IVAN L. HYLAND, WILMON Tucxnn.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. O. 

